To compare the results obtained from the three different models, in [1]} the fourth-order adiabatic vacuum was chosen even in the contracting phase for LQC. Here, we cite some of the results in Fig. REF . In particular, it was found that
the relative difference in the amplitudes of the power spectra of the scalar perturbations due to the choice of \(\Omega ^2\)  or \(\Omega ^2_\mathrm {eff}\)  is about \(10\%\)  in the infrared regime, about \(100\%\) 
in the intermediate regime, and about \(0.1\%\)  in the UV regime. Since only modes in the UV regime can be observed currently, clearly this difference is out of the sensitivities of the current and forhcoming
observations [2]}.
